Air-cooled engine



-0ct. 28 1924 A l,5ll3,335

' H. B. MAssEY AIR COOLED ENGINE Filed Feb. 24 1920 4 sheets-sheet 2 um l!" Illini y .2m/1770)? 25 y @Wag/Massy KCQM H. B. MASSEY AIR COOLED ENGINE Filed Feb.. 24, 1920 4 Shee-t'sSheet 5 awww* N Nl Patented Oct. 28, 1924.

' UNITED STATES OHIO, A CORPORATION OF OHIO.

1,513,335 PATENT OFFICE.

. HEMSLEY .'B. MASSEY, OF CANTON, OHIO; BYw OPERATION OF LAW TO E. A. MCCUS-KEY,

TRUSTEE IN BANKRUPTCY OF THE HOLMES AUTOMOBILE COMPANY, OF CANTON,

AIR-COOLED ENGINE.

Application ledFebruary 24, 1920. Serial No. 360,668.

To all lwhom it may concern.

Be it known that I, HEMSLEY B. MAssEY, a citizen of the United States, residing at Canton, in the county of Stark and State of Ohio, have invented certain new and useful Improvements in Air-Cooled Engines, of which the following is a specification'.

The invention relates to air cooled internal combustion engines lfor automobiles, trucks, tractors, stationary .engines of small size and other uses, andthe object of the improvement is to increase the efficiency of the cooling system, and to extend the power capacity and continuous performance of such engines, and the variety and range of Work for which they may be employed.

The power capacity and continuous performance of air cooled engines depends upon the volume of and the efficiency with which cooling air is continuously drawn pastl the cooling fins on the cylinders, within a given period and at a given speed and power, and the ultimate object of the present invention is to increase the continuous air-y moving capacity of the centrifugal exhaust fans which have commonly been combined with engines of this type; with a further object of utilizing the fan case formin a new element in the operating-combination, for connecting vthe transmission of the engine to form a unit power plant; and with the minor pur ose of discharging the exhaust air direct y rearward from the periphery of the fan.

These objects are attained in a practical embodiment of the invention which has given surprisingly successful beneficial results, by providing a peripheral case extendentirely around the fan wheel with spiral ducts arranged to conduct and deflect the air from the tangential course in which it is discharged by the fan wheel, into a course directly rearward of the machine, substantially parallel with the axis thereof; and by securing the forward end of the fan case directly to the rear support of the engine, and securing the transmission directly to the rear end of the fan case.

Such an embodimentof the invention is illustrated in the accompanying drawings, in which- Figure 1 is an outline side elevation of the forward portion of an automobile with parts the same, lookon line 6-6, Figs. 3 and 5, also showingthe fan wheel in broken lines therein.

Similar numerals refer to similar parts throughout the drawings.

'. I The engine hood-1, the cylinders 2, the

I Jackets 3, the deck 4, the crank case 5, the

side closure 6, the boot 7, the rear support 8, and the other engine parts may be of any well known construction and arrangementy for directing cooling air from the front portal 9 of the hood through the cylinder cooling iues formed by the cylinder fins 10 and the surrounding jacket 3, and through the communicating suction chamber formed by the side closure and the boo-t, to the inlet opening 1l of the exhaust fan.

The fan wheel 12 illustrated is of an ordinary centrifugal type, and is securely mounted upon the rear end of the engine shaft 13 by the flange 14 and the Hy wheel 15 1n the usual manner, and'on the rear side of the y wheel isv secured the clutch drum 16, carrying the usual clutch mechanism 17.

The fan case 18 is in the general form of a series of spiral shells 19 cast between or upon the end lrims 20 and 21; the larger forward rim 20 being secured directly to the outer rim 22 of the rear sup-port 8 of the engine by means of' bolts as 23, and to the :smaller rear rim 21 is directly secured the transmission housing 24 by means of bolts, as 25, in which housing is mounted the usual transmission mechanism 26.` The integral conical collar 27 is preferably -interposed between the spiral shells 19 and the rear rim 21, to ex-tend the case to the rear side of the clutch mechanism. r

The inner end or edges 19a of the s iral shells 19 are located in cylindrical a inement at spaced intervals apart, adjacent to fan, its case and adjaf as periphery or el@ lan what as tea lshown in Fig. 5; whence the several shells diverge spira/ily, and constitute the inner and outer walls, respectively or the similar 'mouth 32 of its own spiral duct opening directly rearward from the fan case, as best shown in lFig. 3.

rl`he rearward wall V33 of each air duct, extends as a radial triangular :dan e, between the forward edge of the conica collar 27 and the outer spiral wall 19 of the particular duct, and terminates, at the other side or edge 3d of the outlet mouth 32 of its own spiral duct.

'llhe inner ends or edges 19u of the spiral shells 19, are inclined at a substantial angle from the axis of the fan, as best shown in Fig. 6, not only for the purpose of enlargin the throats of the air ducts at the rear si es thereof, but `:for the further important purpose of preventing a whistling or roaring of the air, as it is cut b these edges upon entering the ducts; and :tor further preventing a noisy vibration, these edges are made of substantial thickness with a round or blunt bevel, as shown in Fig. 5, of the draw- 'he fan case thus described constitutes a rigid connection between the transmission and the engine, and extends entirely around the periphery or the fan wheel without in ny way obstructing the operation of the 0n the contrary, the fan case more than doubles the volume of air moved by the fan wheel, over the action of the same fan without a case and in discharging the air into the open delects it directly toward the rear of the machine, and decreases the wind resistance of the machine and the blowing of dust from the road.

rlhe combination of the fan case with the fan, the suction chamber and the cylinder fins and jackets, renders it possible to air cool engines of larger power capacity, and

' to use a higher cylinder compression ratio,

thus increasing engine eiiiciency; and these results as well as the increase in the volumetric eciency of the fan, caused by the presence of the casing, are accomplished at the saine fan speed and without absorbing any more power for driving the ran.

llt -ul be understood that the use of a terasse plurality of air ducts and the spiral term and rearward curvin or the same, are not essential to the generic invention, but these specic features of construction and arrangement are referred for the savin of space and the escribed benefits resultlng therefrom. p

ll claim:

1. The combination of the cylinder cooling lues and communicating suctlon chamber or an automobile en ine or the like with a centrifugal fan Whee exhausting 'air therefrom, and a peripheral case extendin entirelr around the wheel forming iral s ells lead ing tan entially from the En wheel, dividing an directing the discharge into the open and increasing the volume of air moved by the fan wheel.

2. 'lhe combination of the cylinder cooling ues and communicating suction chamber of an automobile engine or the like with a centrifugal fan wheel 'exhausting air therefrom, and a peripheral case extending entirel around the wheel forming air ducts leading tangentially from the fan wheel, directing the discharge into the lo en and increasin the volume of air mov by the fan wheel 3.. The combination of the cylinder coo 1; flues and communicating suction chamber of an automobile engine or the like with a centrifugal fan wheel exhausting air therefrom, and a peripheral case extending entirely around the wheel forming curved air ducts leading tangentially, dischargin rearwardly into the open, and increasing the volume of air moved by the fan wheel.

4. The combination of the cylinder cooling iiues and communicating suction chamber of an automobile or the like with a centrifugal fan wheel exhausting air therefrom, and a peripheral case extending entirely aroun i the Wheel including walls forming air ducts leading tangentially into the open from the fan wheel, the inner edges of the walls being formed at an angle to the axis of the fan.

5. rlhe combination of the cylinder cooling iiucs and communicating suction chamber of an automobile engine or the like with a centrifugal fan wheel exhausting air therefrom, and a peripheral case extending entirely around the wheel including walls dividing and directing air into the open from the fan wheel, the inner ends of the walls bein located adjacent to the periphery oit the an wheel and belng formed at an angle to the axis thereof. y

6. rlhe combination of the cylinder cooling Hues and communicating suction chamber oi an automobile engine or the like with a centrifugal fan wheel exhausting therefrom, and a peripheral case extending entirely around the wheel including w divig and directing air into the open from the wheel, the inner ends of the walls being l`ofan Wheel on the shaft between the'support cated adjacent to the peripher of the fan and the housing, and a cylndro shell conand being made of substantlalt ickness with necting the support and the housing form- 10 a blunt beveled ed e. ing fiues directing the discharge of air into 7. In an automo ile engine, a. rear supthe open from the whee port, an adJacent transmisslonhousmg, a

shaft bearing in the engine, a centrifugal HEMSLEY B. MASSEY. 

